96-023 Ordinance - Laserfiche WebLink

Home Browse Search

?..?...?.?,..?.. .. ?.._. • ? ? B. Presence of toxic gases. Equal to or more than 10 ppm hydrogen sulfide. If the presence of other toxic contaminants is suspected, specific monitoring to its PEL will be conducted. C. Presence of explosive/flammable gases. Equal to or greater than 10% of the lower explosive limit (LEL). D. Oxygen Deficiency. A concentration of oxygen in the atmosphere equal to or less than 19.5 % by volume. III. SIMPLI?'I'IED ENTRY REQUIREIVMNTS A permit required confined space may be entered without the need for the completing an entry permit or assigning an attendant if, 1) the space is determined not to be a permit required confined space, or 2) the space can be maintained in a safe condition for entry by mechanical ventilation alone. All spaces shall be considered permit-required confined spaces until a pre-entry evaluation demonstrates otherwise. A Simplified Permit must be completed by the entry supervisor before entry into these spaces. This simplified permit verifies completion of minimum safety guidelines. If problems are encountered, however, the entrants must be removed, and the permit space re-evaluated. A. Pumps and Lines. All pumps and lines which may reasonably cause contaminants to flow into the space shall be disconnected, blinded and locked out, or effectively isolated by other means to prevent development of dangerous air contamination or engulfinent. Not all laterals to sewers or storm drains require blocking. However, where experience or knowledge of industrial use indicates there is a reasonable potential for contamination of air or engulfinent into an occupied sewer, then all affected laterals shall be blocked. If blocking and/or isolation requires entry into the space, the provisions for entry into a permit-required confined space must be implemented. B. Surveillance. The surrounding area shall be surveyed to avoid hazards such as drifting vapors from the tanks, piping, or sewers. Attachment D